Security apparatus

ABSTRACT

A security apparatus for securing a portable electronic device to an immovable object includes a locking head having a base and a plurality of engagement portions extending from the base. The plurality of engagement portions is configured to be inserted into an aperture of the portable electronic device. The locking head also includes a linear portion positioned between the plurality of engagement portions and extending from the base. The linear portion is twistable about its length to move the plurality of engagement portions radially outward. The security apparatus further includes a security device attached to the locking head and configured to engage the immovable object.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/784,690, filed on Oct. 16, 2017, which is a continuation of U.S.patent application Ser. No. 15/217,200, filed on Jul. 22, 2016, which isa continuation of U.S. patent application Ser. No. 14/275,051, filed onMay 12, 2014, which is a continuation of U.S. patent application Ser.No. 12/446,560, filed on Feb. 7, 2011, which is a national stage entryof International Application No. PCT/US07/82113, filed on Oct. 22, 2007,and which is a non-provisional of and claims the benefit of the filingdates of the following U.S. provisional patent applications: 60/853,888,filed on Oct. 23, 2006, 60/909,867, filed on Apr. 3, 2007, and60/940,318, filed on May 25, 2007, all of which are herein incorporatedby reference in their entirety for all purposes.

BACKGROUND

Embodiments of the present invention relate to devices for inhibitingthe theft of relatively small but expensive pieces of equipment.

Computers have evolved rather rapidly from large, expensive machinesusable only by a few, to relatively small, portable machines which areusable by many. In particular, the development of personal computerswith significant processing power has made computers available to thegeneral population. It is now common for college and even high schoolstudents to have their own computer, and personal computers are in widespread use as word processors and work stations in almost all forms ofbusiness. Personal computers are relatively small and easilytransportable, and an undesirable side effect of their proliferation isthe fact that the theft of such computers is a significant problem.

A variety of devices have been developed to inhibit the theft ofpersonal computers and similar equipment. Since personal computersystems involve several components, typically including the computeritself, a separate monitor, keyboard and often a printer, such securitysystems often employ a cable which attaches each of the components toeach other and to a relatively immovable object such as a desk. Theprincipal difficulty in such systems is providing an effective andconvenient method for attaching the cable itself to the equipment.

One way to address the problem of computer security is to provide asmall, generally rectangular slot in a wall of a computer. A securityapparatus with a locking head may be secured to the computer via therectangular slot.

While the conventional rectangular slot solution is effective,improvements could be made. For example, although thieves are deterredfrom stealing portable computers secured by conventional securitymechanisms, in some cases, such thieves may be more interested in thedata stored in the computers rather than the computers themselves.Accordingly, the damage that may occur to a computer that may occurduring the theft of the computer may not deter a thief who wants thedata stored inside of the computer. It would be desirable to improve thestrength of the physical coupling between the security apparatus and thecomputer and so that it is more difficult for potential thieves toseparate the security apparatus from the computer.

Embodiments of the invention address these and other problems,individually and collectively.

BRIEF SUMMARY

Embodiments of the invention are directed to security apparatuses,systems, and methods for using such security apparatuses. Otherembodiments of the invention may be directed to lock interface membersand systems and methods incorporating such lock interface members.

One embodiment of the invention is directed to a system including aportable electronic device comprising a lock interface member having anaperture and a protrusion, and a security apparatus. The securityapparatus comprises a head comprising an engagement element adapted toengage the lock interface member via the aperture and the protrusion,and is preferably cooperatively structured with the protrusion. The headalso comprises a stabilizing element capable of preventing theengagement element from being separated from the lock interface memberwhen the engagement element is in a locked configuration.

Another embodiment of the invention is directed to a method for securinga security apparatus. The security apparatus is used with a lockinterface member having an aperture and a protrusion. The securityapparatus comprises a head comprising an engagement element adapted toengage the lock interface member via the aperture and the protrusion.The head also comprises a stabilizing element capable of being insertedinto the lock interface member to prevent the engagement element frombeing removed from the aperture, and a security device attached to thehead. The method includes: (a) inserting the engagement element into theaperture, (b) moving the engagement element so that the engagementelement is secured to the lock interface member, and wherein at least aportion of the engagement element engages the protrusion, and (c)inserting the stabilizing element into the lock interface member.

Another embodiment of the invention is directed to a security apparatusfor use with a lock interface member having an aperture and aprotrusion. The security apparatus includes a head comprising anengagement element adapted to engage the lock interface member via theaperture and the protrusion. The engagement element is configured toengage the lock interface member. The head also includes a stabilizingelement that is capable of being inserted into the lock interface memberto prevent the engagement element from being removed from the aperture.A security device may be attached to the head.

These and other embodiments of the invention are described in furtherdetail below.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a portable electronic device and asecurity apparatus.

FIG. 2(a) shows a front, perspective view of a portion of a securityapparatus according to another embodiment of the invention.

FIG. 2(b) shows a rear perspective view of the security apparatusportion shown in FIG. 2(a), along with a perspective view of a lockinterface member in a portable electronic device.

FIG. 2(c) is an exploded view of the security apparatus shown in FIGS.2(a)-2(b).

FIG. 2(d) shows a perspective view of a portion of the securityapparatus shown in FIGS. 2(a) and 2(b) when it is configured in a lockedposition in a lock interface member in a portable electronic device. Aportion of the portable electronic device is cut away for clarity ofillustration.

FIG. 2(e) shows a side, cross-sectional view of the portion of thesecurity apparatus and portable electronic device shown in FIG. 2(c).

FIG. 2(f) shows a top, cross-sectional view of the portion of thesecurity apparatus and the portable electronic device shown in FIG.2(c).

FIG. 2(g) shows a side view of a head of the type shown in FIG. 2(a).

FIG. 2(h) shows a perspective view of the head shown in FIG. 2(g).

FIG. 2(i) shows a rear view of the head shown in FIG. 2(h).

FIG. 2(j) shows a side view of the head shown in FIG. 2(i).

FIG. 2(k) shows a front view of the head shown in FIG. 2(i).

FIG. 3(a) shows a front view of a portion of a security apparatusaccording to another embodiment of the invention, as it is about to besecured to a portable electronic device via a lock interface member.

FIG. 3(b) shows a perspective view of the portion of the securityapparatus shown in FIG. 3(a) as it is inserted into the lock interfacemember. A portion of the lock interface member and the portableelectronic device are cut away for clarity of illustration.

FIG. 3(c) shows a perspective view of the portion of the securityapparatus shown in FIG. 3(a), as a portion of the head in the securityapparatus is inserted into the lock interface member, and is rotated toengage engagement elements in the head to inner protrusions and slots inthe lock interface member.

FIG. 3(d) shows a horizontal cross-sectional view of a lock interfacemember.

FIG. 3(e) shows a horizontal, cross-sectional view of the portion of thesecurity apparatus shown in FIG. 3(a).

FIG. 3(f) shows a side, cross-sectional view of the head of the securityapparatus shown in FIG. 3(c), before a stabilizing element is insertedinto the lock interface member.

FIG. 3(g) shows a side, cross-sectional view of the head of the securityapparatus shown in FIG. 3(c), after a stabilizing element is insertedinto the lock interface member.

FIG. 3(h) shows a perspective view of the security apparatus shown inFIG. 3(c), after a stabilizing element is inserted into the lockinterface member. A portion of the lock interface member and theportable electronic device are cut away for clarity of illustration.

FIG. 3(i) is a front view of a lock interface member.

FIG. 3(j) shows a side cross-sectional view of the lock interface membershown in FIG. 3(i).

FIG. 3(k) is a perspective view the lock interface member shown in FIG.3(i).

FIG. 3(1) is a top view of the lock interface member shown in FIG. 3(i).

FIGS. 3(m) and 3(n) are perspective views of other lock interfacemembers according to other embodiments of the invention.

FIGS. 4(a)-4(c) show perspective views of another security apparatus andlock interface member according to an embodiment of the invention.

FIG. 4(d) shows a side-cross-sectional view of the security apparatus inFIGS. 4(a)-4(c) when it is engaged with the lock interface member.

FIGS. 5(a)-5(c) shows perspective, front, and side views of a lockinghead.

FIGS. 6(a)-6(b) show front views of lock interface members.

FIGS. 7(a)-7(c) show cross-sectional views of a lock interface member.

FIG. 8 shows an exploded view of a lock head and a lock interface memberaccording to one embodiment of the invention.

FIGS. 9(a)-9(b) respectively show perspective views of a locking headembodiment in unlocked and locked configurations.

FIG. 9(c) shows a side view of the locking head embodiment shown inFIGS. 9(a)-9(b) when it is engaged with a lock interface member.

FIG. 9(d) shows a top view of the locking head embodiment shown in FIG.9(a)-9(b) when it is engaged with a lock interface member.

FIGS. 10(a)-10(b) respectively show perspective views of another lockinghead embodiment in unlocked and locked configurations.

FIG. 10(c) shows an outward view of the locking head embodiment shown inFIG. 10(c), when it is engaged with a lock interface member.

FIGS. 11(a)-11(b) respectively show perspective views of another lockinghead embodiment in unlocked and locked configurations.

FIG. 11(c) shows an outward view of the locking head embodiment shown inFIG. 11(c), when it is engaged with a lock interface member.

FIG. 12(a) shows a perspective view of another locking head embodiment,in an unlocked configuration.

FIG. 12(b) shows an outward view of the locking head embodiment shown inFIG. 12(a) when it is engaged with a lock interface member.

FIG. 12(c) shows a top view of a portion of the locking head shown inFIG. 12(a).

FIGS. 13(a) and 13(b) respectively show a perspective view and side viewof another locking head embodiment in a locked configuration.

FIG. 13(c) shows a perspective view of the locking head embodiment in anunlocked configuration.

FIGS. 14(a)-14(b) respectively show perspective views of another lockinghead embodiment in unlocked and locked configurations.

FIGS. 14(c) shows a perspective view of the locking head shown in FIGS.14(a)-14(b) in a partially exploded view.

FIGS. 14(d)-14(e) respectively show side views of another locking headembodiment in unlocked and locked configurations.

FIGS. 15(a)-15(b) respectively show perspective views of another lockinghead embodiment in unlocked and locked configurations.

FIG. 15(c) shows an outward view of the locking head embodiment shown inFIGS. 15(a)-15(b), when it is engaged with a lock interface member.

FIG. 16 shows perspective views of another security apparatus embodimentin disassembled and assembled states.

FIGS. 17(a)-17(b) respectively show perspective views of another lockinghead embodiment in unlocked and locked configurations.

FIG. 17(c) shows an outward view of the locking head embodiment shown inFIGS. 17(a)-17(b), when it is engaged with a lock interface member.

FIGS. 18(a)-18(b) respectively show perspective views of another lockinghead embodiment in unlocked and locked configurations.

FIG. 18(c) shows an outward view of the locking head embodiment shown inFIGS. 18(a)-18(b), when it is engaged with a lock interface member.

FIGS. 19(a)-19(b) respectively show perspective views of another lockinghead embodiment in unlocked and locked configurations.

FIGS. 19(c)-19(d) respectively show outward views of the locking headembodiment shown in FIGS. 19(a)-19(b), when they are in unlocked andlocked configurations when associated with a lock interface member.

FIG. 20(a) shows a perspective view of another locking head embodiment.

FIGS. 20(b) and 20(c) respectively show embodiments where the lockinghead is not secured to a lock interface member and where the lockinghead is secured to the lock interface member.

FIGS. 21(a) and 21(b) respectively show a locking head with astabilizing element in a retracted position and an extended position.

FIG. 21(c) shows a locking head with an engagement element not engagedwith a lock interface member.

FIG. 21(d) shows a locking head with an engagement element that isengaged with a lock interface member.

FIG. 22(a) shows a locking head embodiment with an engagement element ina retracted position.

FIG. 22(b) shows a locking head embodiment with an engagement element inan extended position.

FIG. 22(c) shows a locking head that is secured to a lock interfacemember.

FIGS. 23(a) and 23(b) show a locking head embodiment in an unlockedconfiguration and a locked configuration.

FIG. 23(c) shows a side, cross-sectional view of the locking headembodiment shown in FIG. 23(a).

FIGS. 24(a) and 24(b) respectively show side cross-sectional views oflocking head embodiments that are in unlocked and locked configurations.

FIG. 24(c) shows a perspective view of a locking head embodiment in alocked configuration.

FIG. 25(a) shows a perspective view of a locking head embodiment in alocked configuration.

FIG. 25(b) shows a side, cross-sectional view of the locking headembodiment in FIG. 25(a) in an unlocked configuration.

FIG. 25(c) shows a side, cross-sectional view of the locking headembodiment in FIG. 25(a) in a locked configuration.

FIGS. 26(a) and 26(b) show side views of a locking head embodiment in alocked configuration and an unlocked configuration when present in alock interface member.

FIG. 26(c) shows a perspective view of another locking head embodiment.

FIGS. 27(a) and 27(b) show perspective views of a locking headembodiment in an unlocked and a locked configuration.

FIG. 27(c) shows a locking head embodiment when the locking head issecured to a lock interface member.

FIG. 28(a) shows a side, cross-sectional view of another locking headembodiment in an unlocked configuration.

FIG. 28(b) shows an axial view of the locking head embodiment shown inFIG. 28(a).

FIG. 28(c) shows a perspective view of a locking head embodiment in alocked configuration.

FIG. 29(a) shows a perspective view of another locking head embodimentin a locked configuration.

FIG. 29(b) shows an axial view of the locking head embodiment shown inFIG. 29(a).

FIG. 29(c) shows a side, cross-sectional view of a locking headembodiment in a locked configuration.

FIGS. 30(a)-30(b) respectively show locking head embodiments in lockedand unlocked configurations.

FIGS. 31(a)-31(b) respectively show locking head embodiments in lockedand unlocked configurations.

FIG. 32(a) shows another locking head embodiment.

FIGS. 32(b)-32(c) show side views of other locking head embodiments.

FIGS. 33(a)-33(b) respectively show locking head embodiments in unlockedand locked configurations.

FIG. 33(c) shows a locking head embodiment secured to a lock interfacemember.

FIG. 34(a) shows a perspective view of another locking head embodiment.

FIGS. 34(b)-34(c) show side, cross-sectional views of another lockinghead embodiment in an unlocked and locked configuration.

FIGS. 35(a)-35(b) show a perspective view of another locking headembodiment in an unlocked and a locked configuration.

FIGS. 35(c)-35(d) respectively show how pushing a button on a lock bodyand how rotating a barrel on a lock body can be used to rotateengagement element portions.

FIGS. 36(a)-36(b) show perspective views of another locking headembodiment in an unlocked and a locked configuration.

FIG. 36(c) shows the locking head embodiment shown in FIG. 36(a) when itis secured to a lock interface member.

FIGS. 37(a)-37(b) show perspective views of another locking headembodiment in an unlocked and a locked configuration.

FIGS. 37(c)-37(d) respectively show side views of locking headembodiments within a lock interface member.

FIGS. 38(a)-38(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIGS. 38(c)-38(d) respectively show outward views of the locking headembodiments in FIGS. 38(a)-38(b) when they are within a lock interfacemember.

FIGS. 39(a)-39(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIGS. 39(c)-39(d) show side cross-sectional views of the locking headembodiments in FIGS. 39(a)-39(b) when they are within a lock interfacemember.

FIGS. 40(a)-40(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIG. 40(c) shows an outward view of the locking head embodiment shown inFIG. 40(b) when it is inside of a lock interface member.

FIGS. 40(d)-40(e) show side cross-sectional views of the locking headembodiments in FIGS. 40(a)-40(b) when they are within a lock interfacemember.

FIGS. 41(a)-41(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIGS. 41(c) and 41(d) show additional views of the locking headembodiments in FIGS. 41(a)-41(b) when they are within a lock interfacemember.

FIGS. 42(a)-42(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIG. 42(c) shows a side view of the locking head embodiment shown inFIGS. 42(a)-42(b).

FIGS. 43(a)-43(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIGS. 43(c)-43(d) respectively show an engagement element in an unlockedand a locked configuration.

FIGS. 44(a)-44(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIGS. 44(c)-44(d) respectively show an engagement element in an unlockedand a locked configuration.

FIGS. 45(a)-45(b) respectively show perspective views of another lockinghead embodiment in an unlocked and a locked configuration.

FIGS. 45(c)-45(d) respectively show an unlocked and a lockedconfiguration of an exemplary engagement element.

In the Figures, like numerals designate like elements.

DETAILED DESCRIPTION

Embodiments of the invention are directed to security apparatuses,methods for using security apparatuses, and systems using such securityapparatuses. The security apparatuses can be used to prevent or deterthe theft of devices such as portable electronic devices.

In addition, in embodiments of the invention, a lock interface membermay be used to enhance security and to improve the strength of thecoupling between a portable electronic device and a security apparatus.The lock interface member may be an attachment that may be attached tothe housing of the portable electronic device, or it may be integrallyformed in the housing or other component of the portable electronicdevice. For example, in some embodiments, the lock interface member maybe integrally formed with (e.g., a wall portion of a wall or chassisportion of a chassis, and the lock interface member may be formed fromthe same material without an interface), or operatively or physicallycoupled to the chassis of the portable electronic device and/or may beoperatively or electrically coupled to some electrical component (e.g.,a memory chip, disk drive, or microprocessor) in the portable electronicdevice. In addition, if the lock interface member is a separatecomponent from the wall of the portable electronic device, the lockinterface member may be positioned within an aperture formed in a wallof the portable electronic device, or inside of the portable electronicdevice. Exemplary lock interface members are described in further detailbelow.

By using a lock interface member, the strength of the coupling betweenthe security apparatus and the lock interface member is increased over aconventional physical security system including a portable electronicdevice comprising only a 3.times.7 mm.sup.2 security slot and a physicalsecurity apparatus secured to the portable electronic device via thesecurity slot. A conventional security system such as this can withstand150 lbs of force, because the plastic housing of the portable consumerdevice can fail or break when this magnitude of force is applied. Also,current locks on the market are designed to withstand 300 lbs of forcebefore they are broken. Further, the ability to “torque” theconventional security apparatus out of a security slot is also ofconcern. Improved security apparatuses and systems are thereforedesirable.

Using embodiments of the invention, the strength of the coupling betweenthe security apparatus and the portable electronic device may beincreased by at least 2, 6, or even 8 times compared to conventionalsystems. For example, by using embodiments of the invention, it may takemore than about 300 lbs of force, or even more than about 500, 1000, or2000 lbs of force to break the physical coupling between the head in asecurity apparatus and the lock interface member associated with theportable electronic device to which it is secured. As shown below, theengagement elements and stabilizing elements are preferablycooperatively structured with the internal surfaces of the lockinterface member. The potential contact area between the engagementelement and the inner surfaces of the lock interface member is more thanin a conventional locking system. For example, in some embodiments, thecontact area between the lock interface member and parts of acorresponding locking head can be at least about 5 times greater thanconventional security systems. This increased contact area can alsoprovide for better load distribution when stresses are applied to matingsurfaces. The engagement elements and the stabilizing elements are alsostronger than conventional elements in conventional locks, and weaklinks are reduced as compared to conventional security systems.Accordingly, embodiments of the invention are stronger and thereforemore effective at deterring and preventing the theft of portableelectronic devices than conventional security systems.

A security apparatus according to an embodiment of the invention maycomprise a head and a security device. The head and the security devicemay be physically and/or operationally coupled together.

The security device may comprise a cable, or some other type of deviceto provide security. If the security device comprises a cable, then thecable may be secured to an immovable object such as a desk or cabinet sothat a portable electronic device coupled to the cable cannot beremoved. The cable may comprise stainless steel, Kevlar®, or some othertype of strong material.

In another embodiment, the security device may comprise a wirelessdevice such as a wireless transmitter and/or receiver. The wirelessdevice may be used in a proximity detection system or a motion detectionsystem. For example, a motion detector could present in the wirelessdevice so that when the motion detector moves, an associated alarm istriggered. The alarm may be in the security device or may be external tothe security device. In another embodiment, there may be a base deviceassociated with the wireless device, and these components may be used ina proximity detection system. Wireless signals may be transmittedbetween the security device and the base device, and when these devicesare separated by a predetermined distance, an associated alarm (e.g., anaudible alarm) may be triggered. The alarm could be in the base deviceor in the security device. The electronics associated with such wirelesssystems are known to those of ordinary skill in the art.

The head in the security apparatus may be a locking head. A locking headaccording to an embodiment of the invention may comprise a lockingmechanism such as a key locking mechanism or a combination lockingmechanism disposed within a locking head housing. Various types oflocking heads are described in further detail below.

In some embodiments, a locking head according to an embodiment of theinvention includes at least one engagement element that is inserted intoan aperture in the lock interface member and engages at least oneprotrusion in the lock interface member. In some embodiments, the atleast one engagement element may comprise lobes that can becooperatively structured with and can engage the at least one protrusionin the lock interface member.

The at least one engagement element can engage the at least oneprotrusion in the lock interface member in any suitable manner. Forexample, the at least one engagement element can be inserted into anaperture in the lock interface member and past at least one internalprotrusion in the lock interface member. Once the at least oneengagement element is inserted past the at least one protrusion, it canbe rotated, or otherwise moved to engage the at least one protrusion.The engagement between the at least one engagement element and the atleast one protrusion could be a single point of contact between them, orcould be a continuous interface between contacting surfaces of theengagement element and the at least one protrusion. In some embodiments,at least 2, 3, or even 4 or more distinct continuous surfaces of theprotrusion can be in contact with and/or facing at least 2, 3, or even 4or more continuous surfaces of the engagement element when theengagement element is engaged to the protrusion.

At least one stabilizing element is also present in the locking head tostabilize the position of the locking head relative to the lockinterface member. The stabilizing element can take various forms. Forexample, the stabilizing elements can be in the form of pins, pillars,etc., and may be integrally formed with other portions of the lockinghead. The stabilizing element may or may not engage protrusions in thelock interface member, and may or may not be inserted into the sameaperture in the locking interface member as the at least one engagementelement.

To secure the locking head to the interface member, the engagementelement can be associated with (e.g., contact, engage, etc.) the lockinterface member before or after the stabilizing element is associatedwith the lock interface member. For example, in some embodiments, theengagement element can first engage the lock interface member. Then, thestabilizing element can be inserted into the lock interface member tosecure the locking head to the lock interface member. In otherembodiments, the stabilizing element may first be inserted into the lockinterface member and then the engagement element may engage the lockinterface member.

The portable electronic device that is to be secured may comprise anysuitable device. Examples of such devices comprise portable computerssuch laptop, desktop, and server computers, flat panel televisions,projectors, printers, monitors, portable music players, printers,external hard-drives, cell phones, etc.

FIG. 1 shows a system comprising a portable electronic device 30 and asecurity apparatus 26 that is used to secure the portable electronicdevice 30 to an immovable object 10 such as a desk leg or the like. Thesecurity apparatus 26 comprises a head 28 and a cable 32 coupled to thehead 28, which may be a locking head in this example. A loop 34 is at aterminal end of the head 28. The cable 32 may comprise a strong materialsuch as stainless steel or Kevlar™.

To secure the portable electronic device 30 to the immovable object, thecable 32 may be wrapped around the immovable object and the head 28 maypass through the loop 34. An engagement element in the head 28 may thenbe inserted into an aperture in the portable electronic device 30, or inan aperture in a lock interface member that is associated with theportable electronic device 30. A stabilizing element may then beinserted into the aperture in the lock interface member to stabilize thehead 28 so that the engagement element cannot be readily withdrawn fromthe aperture. In other embodiments, the stabilizing element may first beinserted into the aperture in the lock interface member, and/or anaperture in the portable electronic device, and the engagement elementmay thereafter be inserted therein to engage the aperture in theportable electronic device or in the lock interface member.

A locking mechanism including any suitable key locking mechanism orcombination locking mechanism may be used to keep the stabilizingelement and/or the engagement element from moving or not moving. Somespecific locking mechanisms are described in this application. Otherlocking mechanisms that are known to those of ordinary skill in the artcould alternatively be used to actuate stabilizing and/or engagementelements to secure a locking head to a lock interface member.

As used herein, in the above described embodiments and in otherembodiments, an “aperture” may include a blind aperture or a throughaperture. A through aperture may be in the form of a hole, or a recess.Apertures according to embodiments of the invention can be of anysuitable size, but preferably have dimensions less than about 10 mm insome embodiments.

As noted above, an embodiment of the invention is directed to a securityapparatus for use with a lock interface member having an aperture and aprotrusion (i.e., at least one protrusion). The protrusion can form partof an internal surface of the lock interface member, and there can beone, two, three, or more protrusions in the lock interface member. Theprotrusions may have the same or different configurations and they bemay regularly or irregularly spaced inside of the lock interface member.Also, the protrusions may have slanted surfaces, and the size and/ordimensions (e.g., an axial dimension) of the protrusions may beproportionate or inversely proportionate to lobes on an engagementelement in a locking head.

Also, as noted above, the security apparatus comprises a head comprisingat least one engagement element that is adapted to engage the lockinterface member via the aperture and the at least one protrusion. Theat least one engagement element is preferably cooperatively structuredwith the at least one protrusion, and the locking head also comprises astabilizing element that is capable of being inserted into the lockinterface member to prevent the locking head from being separated fromthe lock interface member. A security device may be coupled to the head.

Generally, when the locking head, or parts of the locking head, are inan “unlocked configuration,” the locking head is generally removablefrom the lock interface member. When the locking head or parts of thelocking head are in a “locked configuration,” the locking head is notremovable from the lock interface member when it is present in a lockinterface member.

The parts of the locking head and/or the lock interface member may bemade of any suitable material, and may be formed in any suitable manner.Suitable materials include materials such as stainless steel, nickelalloys, etc. They can be formed by machining, molding, etc.

A number of specific embodiments will now be described. It is understoodthat the descriptions above, and the features of the differentembodiments may be combined in any suitable manner and may still bewithin embodiments of the invention. For example, the description of theexemplary materials for the lock interface member and/or the lockinghead above may be applicable to any of the specific embodimentsdescribed below.

FIG. 2(a) shows a front perspective view of a security apparatus 200according to an embodiment of the invention. The security apparatus 200comprises a head 200(a) comprising a body 214 attached to a cable ring218. A ferrule holder 209 and a ferrule 210 are attached to the cablering 218. The ferrule holder 209 and the body 214 may form a base orhousing.

In this embodiment, the head 200(a) comprises an engagement element 205that is rotatable. It also comprises a number of cross-members 204(a)and depressions 204(b) formed between the cross-members 204(a). Theengagement element 205 may also be characterized as having alternatingwider cross-member portions and narrower axial shaft portions.

The head 200(a) also comprises two stabilizing elements 202(a) that areon opposite sides of the engagement element 205. The two stabilizingelements 202(a) are in the form of stationary pins in this embodiment.

FIG. 2(b) shows a rear view of the head 200(a). The rear of the head200(a) has a keyway for receiving a key. The keyway is circular and canreceive a key with a circular cross-section.

FIG. 2(b) also shows a side view of a portable electronic device 208comprising an aperture 208(a), and a lock interface member 206 disposedin the aperture 208(a) of the portable electronic device 208. The lockinterface member 206 may also have its own aperture 206(f). As shown inFIG. 2(b), the lock interface member 206 may have lateral ends which aresomewhat rectangularly shaped, and a central portion which has upper andlower curved portions. The rectangularly shaped portions can becooperatively structured with the stabilizing elements 202(a), 202(b)and may receive them. The rectangular shaped portions may includegenerally straight sides. Further details regarding the lock interfacemember 206 are provided below.

FIG. 2(c) shows an exploded view of the security apparatus 200 shown inFIGS. 2(a) and 2(b). FIG. 2(c) shows a body 214 in the form of acylinder. The body 214 is coupled to an abutment structure 202 via pins216(a), 216(b). The pins 216(a), 216(b) pass through holes 214(a),214(b) in the body 214, and holes in the abutment structure 202 (one ofwhich is hole 202(c)). The abutment structure 202, in this example,comprises a cylindrical structure 202(d) with stabilizing elements202(a), 202(b) in the form of pins extending axially from thecylindrical structure 202(d). The stabilizing elements 202(a), 202(b) inthis embodiment and in other embodiments can have any suitablecross-sectional shape including a circular, square, or rectangularcross-sectional shape.

A locking mechanism comprising a first fixed cylinder 210 and a secondrotatable cylinder 212 are inside of the body 214. The first fixedcylinder 210 comprises a plurality of axially extending holes 210(a)surrounding a central hole 210(b). Likewise, the second cylinder 212(b)comprises a plurality of axially extending holes 212(a) around anothercentral hole 212(b).

A locking spindle 204 passes through the central hole 210(b) in thefirst fixed cylinder 210 and is engaged with the second cylinder 212 viaits central hole 212(b) at its rear end 204(d). The locking spindle 204also includes a central portion 204(c) and a front portion which mayform the engagement element 205. The engagement element 205 may comprisecross-members 204(a) and depressions 204(b) as discussed previously.

A snap ring 219, a ferrule holder 209, and a cable ferrule 210 areattached to the cable ring 218. The abutment structure 202 may fitwithin a hole 218(a) in the cable ring 218. A lock interface member 206is also shown in FIG. 2(f), and can receive the engagement element 205,as well as the stabilizing elements 202(a), 202(b).

In operation, referring to FIGS. 2(a)-2(f) the engagement element 205and the stabilizing elements 202(a), 202(b) are inserted into the lockinterface member 206. As shown in FIG. 2(a), the cross-members 204(a)are aligned with the stabilizing elements 202(a) as the engagementelement 205 and the stabilizing elements 202(a) are inserted into theaperture 206(f) in the lock interface member 206. At this point, thehead 200(a) and its components are in an unlocked configuration, and canbe readily inserted into or withdrawn from the lock interface member206. After the stabilizing elements 202(a), 202(b), and the engagementelement 205 are inserted into the interface member 206, a key (notshown) is inserted into the rear keyway in the head 200(a). The key isthen turned and this in turn rotates the engagement element 205clockwise (or counterclockwise in other embodiments). At this point, thecross-members 204(a) of the engagement element 205 are not aligned withthe stabilizing elements 202(a). Once the key is withdrawn from the rearkeyway in the head 200(a), the head 200(a) and its components can be ina locked configuration.

As shown in FIGS. 2(d), 2(e), and 2(f), the rotation of the engagementelement 205 causes the cross-members 204(a) to fill depressions 206(b)inside of the lock interface member 206. It also causes the protrusions206(a) inside of the lock interface member 206 to fill the depressions206(b) between the cross-members 204(a). The engagement element 205 istherefore strongly interlocked with the lock interface member 206 sothat the head 200(a) cannot be separated from the lock interface member206 and cannot be separated from the portable electronic device 208. Asshown in FIGS. 2(d) and 2(e), the lock interface member 206 may beattached to or may be part of a chassis 201 inside of the portableelectronic device 208.

FIGS. 2(g)-2(k) show various views of the previously described headembodiment. Exemplary dimensions of parts of the locking head are shownin millimeters in FIGS. 2(g) and 2(j). Other dimensions for such partscould be present in other embodiments of the invention. Generally, thefrontal dimensions of the previously described cross members 204(a) inthis embodiment and in other embodiments may less than about 10 mm(e.g., about 5 by 7 mm.sup.2), when the thickness of each cross-member204(a) may be 2.75 mm or about 2.25 mm. The thicknesses of the differentcross-members 204(a) can be different or may be the same. As shown inFIG. 2(g), a depression 204(b) between two adjacent cross members 204(c)may be less than about 2 mm (e.g., about 1.75 mm).

FIG. 3(a) shows another embodiment of the invention. FIG. 3(a) shows asystem including a portable electronic device 308 comprising an aperture308(a), and a lock interface member 306 in the aperture 308(a). The lockinterface member 306 has opposing curved walls 306(b) and opposingrectangular ends 306(a), and may have its own aperture 306(f).

FIG. 3(a) also shows a security apparatus 300 comprising a head 300(a)comprising an engagement element 304 at a front end, and a push cylinder324 at a rear end. A cable ring 318 including an attachment portion318(b) and a body 314 form a housing for the head 300(a). A cableferrule 310 extends from the attachment portion 318(b). These componentsare disposed between the ends of the push cylinder 324 and theengagement element 304. A rubber bumper 312 also surrounds theengagement element 304. In this example, the engagement element 304would have a fixed position relative to the body 314 and/or the cablering 318. As in prior embodiments, the engagement element 304 includescross-members 304(a) and depressions 304(b) between the cross-members304(a).

A method for using the security apparatus shown in FIG. 3(a) can bedescribed with reference to FIGS. 3(b)-3(e). As shown in FIG. 3(b), theengagement element 304 is inserted into the lock interface member 306.At this time, the push cylinder 324 is in an extended position and abiasing element such as a spring (not shown) in the head 300(a) is in anuncompressed state.

Referring to FIGS. 3(c) and 3(d), the entire head 300(a) is rotated sothat the engagement element 304 is correspondingly rotated (e.g., 90degrees). The cross-members 304(a) and the depressions 304(b) arecooperatively structured with and engage protrusions 306(c) in the lockinterface member 306. The head 300(a) is thereafter engaged with thelock interface member 306 and the portable electronic device 308.

A cross-section of the lock interface member 306 is shown in FIG. 3(d).In this example, the aperture 306(f) is a blind aperture, because thelock interface member 306 has a rear wall 306(h). In other embodiments,the rear wall 306(e) could be omitted, and in this case, the lockinterface member 306 would be a through aperture. The lock interfacemember 306 may comprise the same or different materials than thepreviously described lock interface members.

The inside of the lock interface member 306 has a number of internalprotrusions 306(c) (e.g., ribs) that fill a portion of the radialcross-section of the aperture 306(f) in the lock interface member 306.The edges of the internal protrusions 306(c) in the lock interfacemember 306 shown in FIG. 3(d) may be defined by chords which extend fromone part of the inner wall of the lock interface member 306 to anotherpart of the inner wall of the lock interface member 306. The protrusionscan be in any suitable form including bumps, plates, cylinders,pyramids, etc.

In FIG. 3(d), the lock interface member 306 has four internalprotrusions 306(c). In this example, a pair of opposing internalprotrusions is disposed towards the front of the aperture 306(f) and apair of opposing internal protrusions is disposed towards the rear ofthe aperture 306(f). As explained above, the internal protrusions 306(c)are received in depressions 304(b) in the engagement element 304 whenthe engagement element 304 is engaged to the lock interface member 306.The walls defining the slots 306(a) also define the aperture 306(f) inthis example.

The lock interface member 306 also comprises at least one slot 306(a)configured to receive a movable or non-movable stabilizing element. Inthis example, there are two such slots (one is shown in FIG. 3(d))between the opposing pairs of protrusions 306(c). However, in otherembodiments, there may be more or less stabilizing element receivingslots 306(a) in the lock interface member 306.

As shown in FIG. 3(d), the lock interface member 306 also comprises anumber of external protrusions 306(d) and 306(e). These externalprotrusions 306(d), 306(e) can be used to secure the lock interfacemember 306 to the portable electronic device 308. Alternatively, thelock interface member 306 could be an integral part of a portion of aportable electronic device.

FIG. 3(e) shows a horizontal cross section of the lock apparatus when atleast one stabilizing element 330 and at least one engagement element304 is present in the lock interface member 304. As shown in FIG. 3(e),the internal protrusions 306(c) in the lock interface member 306 fillthe depressions 304(b) between the protrusions 304(a) in the engagementelement 304. Consequently, the engagement element 304 is secured to thelock interface member 306 and the portable electronic device 308.

FIGS. 3(f)-3(h) show how a stabilizing element 330 in the lock apparatuscan be inserted into the lock interface member 306. After the engagementelement 304 is engaged with the lock interface member 306 as shown inFIG. 3(c), a user may push the push cylinder 324 inward as shown in FIG.3(f). As shown in FIGS. 3(g) and 3(h), the stabilizing elements 330(a),330(b) then fill the opposing slots (including slot 306(a)) in the lockinterface member 306 to stabilize the position of the engagement element304 and the locking head 300(a). The locking mechanism associated withthe stabilizing element 330 can be the same as or different than thelocking mechanism that is associated with the stabilizing element 102shown in FIG. 2(e) in U.S. provisional application Nos. 60/853,888,filed on Oct. 23, 2006; and 60/909,867, filed on Apr. 3, 2007. Forexample, as in the embodiment described in FIG. 2(e), to unlock the head300(a), a key may be used and to turn a spindle which in turn causes aclip to disengage from the spindle. A biasing element such as a springcan then be used to push the stabilizing elements towards the rear ofthe lock head and are withdrawn from the slots in the lock interfacemember 306.

FIGS. 3(i)-3(l)) show front, side cross-sectional, perspective, and topviews of the lock interface member 306. Various dimensions are alsoshown in millimeters. As shown, the width of the aperture 306(f) may beabout 10 mm or less, while the height of the aperture 306(f) may beabout 6.5 mm or less. Opposing internal protrusions 306(c) may be spacedapart by about 2.85 mm or less in some embodiments.

The lock interface member 306 includes a main portion 306(b) which maybe generally cylindrically shaped. External protrusions 306(d) mayextend outward from the main portion 306(b). The external protrusions306(d) may be used to secure the lock interface member 306 to a portableelectronic device. The lock interface member 306 has a low profile sothat it can be incorporated into a thin portable electronic device suchas a laptop computer. However, it also has a high internal surface areaso that its strength is improved over a traditional security slot in aconventional laptop computer.

FIG. 3(m) shows another lock interface member 306-2 according to anembodiment of the invention. Lock interface member 306-2 includes twolateral wings 306(i) with holes. Securing elements such as bolts orscrews may be inserted into the holes so that the lock interface membercan be secured to a portion (e.g., an internal chassis) of a portableelectronic device. FIG. 3(n) shows a similar lock interface member 306-3with only one wing 306(j).

FIG. 4(a) shows another embodiment of the invention. FIG. 4(a) shows asecurity apparatus 600 comprising a head 600(a). The head 600(a)comprises a body 628, and a ferrule holder 631. The head 600(a) alsocomprises stationary first and second stabilizing elements 604(a),604(b), and a rotatable engagement element 602. In other embodiments,the stabilizing elements 604(a), 604(b) could be retractable. In thisexample, the stabilizing elements 604(a), 604(b) are about 120 degreesapart.

The rotatable engagement element 602 comprises a shaft and a pluralityof lobes on the shaft. In this example, the lobes comprise first,second, and third lobes 602(a), 602(b), 602(c). As will be described infurther detail below, the different lobes 602(a), 602(b), 602(c) havedifferent axial lengths. In other embodiments, the lobes 602(a), 602(b),602(c) may have the same lengths.

The rotatable engagement element 602 and the first and secondstabilizing elements 604(a), 604(b) can engage and interface with thelock interface member 610. The lock interface member 610 comprises anaperture 610(e) defined by a wall 610(d). In this example, the wall610(d) has a circular shape. The lock interface member 610 alsocomprises a pair of external protrusions 610(a), 610(b) so that the lockinterface member 610 can be secured to chassis of a portable electronicdevice or the like. In other embodiments, the lock interface member 610could have a boss with a screw or other attachment mechanism. It couldalso be part of a computer chassis or could be molded into a computerhousing or the like.

FIG. 4(a) also shows an internal protrusion 610(c) which is axiallyshaped and extends inwardly from the wall 610(d). As will be explainedin further detail below, the protrusion 610(c) can engage one of thelobes on the engagement element 602 to secure the security apparatus 600to the lock interface member 610.

As shown in FIG. 4(b), the engagement element 602 can be inserted intothe aperture 610(e) in the lock interface member 610. To secure thesecurity apparatus 100 to the lock interface member 610, the lobes602(a), 602(b), 602(c) may be inserted inward, between and past adjacentprotrusions (e.g., 610(c)) in the lock interface member 610.

As shown in FIG. 4(c), the engagement element 602 can be rotated afterit is fully inserted into the aperture 610(e) in the lock interfacemember 610. In this example, the engagement element 602 can be rotated60 degrees (e.g., by using a key, or rotating the entire locking head)so that the lobes 602(a), 602(b), 602(c) may be positioned behindcorresponding protrusions in the lock interface member 610. The firstand second stabilizing elements 604(a), 604(b) shown in FIG. 4(a) wouldthen be inserted into corresponding slots in the lock interface member610 so that the head 600(a) is secured to the lock interface member 610and to the portable electronic device (not shown) to which the lockinterface member 610 is attached.

As illustrated in FIGS. 4(a)-4(c), embodiments of the invention may bedirected to a method for securing a security apparatus 100 of the typeshown in FIGS. 4(a)-4(c). The security apparatus 600 comprises a head600(a). The method comprises inserting the engagement element 602 intoan aperture 610(e) in the lock interface member 610, moving theengagement element 602 so that the engagement element 602 is secured tothe lock interface member 610 via the aperture 610(e), and wherein atleast a portion of the engagement element 602 engages the protrusion610(c), and inserting the stabilizing element 604(a) into the lockinterface member 610. In the specifically described examples, thestabilizing element 604(a) is stationary. However, in other embodiments,the stabilizing element 604(a) may be retractable and movable relativeto other parts of the head 600(a) in the security apparatus 600.Suitable methods of use may also comprise wrapping a cable attached tothe head 600(a) around an immovable object, inserting the head into theloop, and securing the head 600(a) to a portable electronic devicecomprising the lock interface member 610.

FIG. 4(d) shows a cross-sectional view of a system including thesecurity apparatus 600 and the lock interface member 610. FIG. 4(d)shows the shape of the protrusion 610(c) and the engagement element 602.As shown, the protrusion 610(c) has a sloped surface 610(c)-1 (about 45degrees) which can interface with a corresponding sloped surface602(a)-1 on the lobe 602(a) on the engagement element 602. The slopedsurface 610(c)-1 and the sloped surface 602(a)-1 may form a 45 degreeangle (or more or less than this) with the axis of the engagementelement 602. The protrusion 610(c) fits into a gap 602(e) defined by theouter surface of the engagement element 602. It is understood thatalthough a protrusion 610(c) with a sloped surface 610(c)-1 is shown inthe security system in FIG. 4(d), this feature may be used in any of thepreviously described embodiments as well. In other embodiments, thesurfaces 610(c)-1 and 602(a)-1 need not be sloped, but could beperpendicular to the axis of the engagement element 602. As shown inFIG. 4(d), at least 3 (or even 4) external surfaces of the engagementelement 602 face at least 3 (or even 4) distinct surfaces of theprotrusion 610(c).

The engaged, opposing sloped surfaces 610(c)-1, 602(a)-1 improve thestrength of the bond between the security apparatus 600 and the lockinterface member 610. For example, if one tries to disengage thesecurity apparatus 600 and the lock interface member 610 by pulling thesecurity apparatus 600 in the direction F2, the engaged, opposing slopedsurfaces 610(c)-1, 602(a)-1 cause any force to be applied to the lockengagement element 610 in a radial direction (e.g., in the direction F1)as well as in an axial direction (e.g., in the direction F1). Sincethere is a plurality of such slanted surfaces on correspondinglobe/protrusion pairs, any pulling forces can be evenly distributedaround the engagement element 602. If the protrusion 610(c) had a flatsurface perpendicular to the axis of the engagement element 602, thenthe protrusion 610(c) would bear substantially all of the force appliedin the axial direction (e.g., direction F2), thereby subjectingprotrusion 610(c) to a greater amount of force and increasing thelikelihood that protruding portion 610(c) might break.

FIGS. 5(a)-5(c) show perspective, front, and side views of the head600(a). Many of the features in FIGS. 5(a)-5(c) are described above.FIGS. 5(a)-5(b), however, more clearly show three lobes 602(a), 602(b),602(c) on the shaft of the engagement element 602. They protruderadially from the axis of the engagement element 602, but are elongatedin the direction of the axis of the engagement element 602. As shown inFIG. 5(a), the lobes 602(a), 602(c) have different lengths, and theslanted surfaces of the lobes 602(a), 602(b), 602(c) may contact theprotrusions in the lock interface member in different planesperpendicular to the axis of the engagement element. This is illustratedby the lines 611 in FIG. 5(c), where each line may represent a differentperpendicular plane corresponding to corresponding to an end portion ofthe lobe 602(a), 602(b), 602(c).

FIG. 5(b) more clearly shows the lobes 602(a), 602(b), 602(c) beinglocated 120 degrees apart from each other, and also two stabilizingelements 610(a), 610(b) being located approximately 120 degrees apartfrom each other. Although specific angular relationships between thelobes 602(a), 602(b), 602(c) and the stabilizing elements 610(a), 610(b)are described and a specific number of lobes and stabilizing elementsare shown in the Figures, it is understood that embodiments of theinvention may include any suitable number of lobes and stabilizingelements in any suitable relative relationships.

FIG. 6(a) shows a front view of the previously described lock interfacemember 610. As shown in FIG. 6(a), the lock interface member 610 hasexternal protrusions 610(a), 610(b) which allows the lock interfacemember 610 to be secured to a portable electronic device (not shown).The wall 610(d) may define two slots 610(e)-1, 610(e)-2 which mayreceive the previously described stabilizing elements 604(a), 604(b)(see FIG. 5(a)). In this example, the slots 610(e)-1, 610(e)-2 may beco-extensive with the aperture 610(e). However, in other embodiments,the slots which receive the stabilizing elements 604(a), 604(b) may beseparately formed from aperture 610(e). For example, the slots could bein the form of stabilizing apertures specifically designed to receivestabilizing elements. The internal and external dimensions of the lockinterface member 610 can be substantially the same as or different thanthe exemplary dimensions of the previously described lock interfacemembers.

The use of the slots 610(e)-1, 610(e)-2 is particularly advantageous.Each slot can receive a stabilizing element, and the slots 610(e)-1,610(e)-2 may be spaced apart. When stabilizing elements are presentwithin them, it is very difficult for one to torque out any locking headthat may be engaged with the lock interface member 610.

As shown in FIGS. 6(a) and 6(b), the internal protrusions 610(c)-1,610(c)-2, and 610(c)-3 are spaced about 60 degrees apart from eachother. Although three internal protrusions are shown in FIGS. 6(a) and6(b), in other embodiments, there can be more or less internalprotrusions.

FIG. 6(a) also shows axial views of three protrusions 610(c)-1,610(c)-2, 610(c)-3 which may extend radially inward. As shown, the innerradial surfaces of the protrusions 610(c)-1, 610(c)-2, 610(c)-3 may becurved to receive the curved outer surface of the shaft of theengagement element 602. As explained previously, rear surfaces of theprotrusions 610(c)-1, 610(c)-2, 610(c)-3 may be slanted to helpdistribute any axial pulling force on the head.

FIG. 6(b) shows another lock interface member 610. It is similar to thelock interface member 610 shown in FIG. 6(a), except that theprotrusions 610(c)-1, 610(c)-2, 610(c)-3 are positioned about 120degrees from the corresponding protrusions 610(c)-1, 610(c)-2, 610(c)-3in FIG. 6(a).

FIGS. 7(a)-7(c) shows cross-sectional views of the lock interface member610. As shown in FIGS. 7(a)-7(c), the three protrusions 610(c)-1,610(c)-2, 610(c)-3 may be elongated and may have different lengths. Inother embodiments, they may have the same lengths. End portions of theprotrusions 610(c)-1, 610(c)-2, 610(c)-3 can be spaced more than about 5mm (e.g., about 5.25, 6.75, and 7.75 mm) from the entrance of the lockinterface member 610 in the illustrated embodiment.

FIG. 8 shows an exploded view of a head 600(a) and lock interface member110 according to one embodiment of the invention. In this specificembodiment, a disk lock mechanism is shown. It is understood that anyother type of lock mechanism (e.g., a tumbler lock mechanism) can beused in the security apparatus 600 including those that have beenpreviously described.

FIG. 8 shows a key 620 which can be used with the head 600(a). The head600(a) comprises a lock body 628 and a ferrule holder 631 (or cablering) which can form a housing for the head 600(a). Pins 624 may be usedto secure an anti-rotation plate 646 with stabilizing elements 604(a),604(b) to the lock body 628. The engagement element 602 passes through acentral hole in the anti-rotation plate 646.

The engagement element 602 is part of a locking spindle 644, which has arear housing including a longitudinal slot 644(a). The longitudinal slot644(a) receives a lock pin 640 when the lock is in a locked position. Inthe locked position, the edges of the disks in a set of disks 630 canpush the pin 640 outward and into the longitudinal slot 644(a) and intoa longitudinal groove (not shown) in the inner surface of the lock body628 so that the locking spindle 644 cannot rotate.

On the other hand, the correct key 620 can be used to turn the disks inthe set of disks to appropriate radial positions so that the notches628(b) in the disks align. As a result, the lock pin 640 can be receivedin the aligned notches, and the lock pin 640 falls out of thelongitudinal groove in the lock body, thereby allowing the lockingspindle 644 to rotate. An ear 628(a) on each disk can prevent the diskfrom rotating beyond a predetermined point. Other components illustratedin FIG. 8 include a key plate 627, a compression spring 626, as well asan alignment disk 642.

The embodiments that are described with respect to FIGS. 4-8 have anumber of advantages. For example, as explained above, the bond betweenthe security apparatus and the lock interface member is very strong,because there is a good deal of contact area between the lock interfacemember and the components of the security apparatus. Also, any axialpulling force applied to the lock head is distributed in differentdirections so that one part of the lock interface member does not haveto bear all of the applied force.

A number of additional locking head embodiments, and correspondinglocking head/interface member combinations, are shown in FIGS. 9-45. Itis understood that any of the embodiments shown in FIGS. 9-45 can beused with any of the previously described embodiments (e.g., the systemin FIG. 1, the lock mechanism shown in FIG. 2(c), the previouslydescribed lock interface members, etc.). Also, although specific lockingmechanisms are not shown in FIGS. 9-45, it is understood that suitablelocking mechanisms can be used to actuate the engagement elements and/orstabilizing elements shown in FIGS. 9-45 can be determined by those ofordinary skill in the art.

FIGS. 9(a) and 9(b) show another example of a locking head 900 accordingto another embodiment of the invention. The locking head 900 comprises afirst portion 902 including a generally cylindrically-shaped base 902(a)with a plurality of integrally formed stabilizing elements 902(b)extending radially outward therefrom. An additional stabilizing element902(c) may extend axially and integrally from the base 902(a), and maybe configured as a trough, which partially contains a second portion inthe form of a movable engagement element 904. As shown in FIG. 9(a), thelocking head, and more particularly, the engagement element 904 may bein an unlocked configuration and may be closer (i.e. proximate) to thestabilizing element 902(c), while the engagement element 904 is further(i.e., distal) to the stabilizing element 902(c) when the engagementelement 904 is in the locked configuration shown in FIG. 9(b). As shown,the engagement element 904 can move radially into and out of the troughformed by the stabilizing element 902(c).

FIG. 9(c) shows parts of the first and second portions 902, 904 of thelocking head 900 being within an aperture in the lock interface member610. The locking head 902 is in a locked configuration in FIG. 9(c),since the second portion 904 including the engagement element is engagedto an internal protrusion in the lock interface member 610. FIG. 9(d)shows an outward view of the locking head 900 and lock interface member610 combination shown in FIG. 9(c). As shown in FIG. 9(d), thestabilizing element 902(c) is between two adjacent internal protrusionsin the lock interface member 610.

FIG. 10(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 910 includes a base 912(which may be part of a housing of the locking head 910) as well asfirst and second arms 914, 916 coupled to the base 912 via a hinge 918.Each arm 914, 916 includes a linear portion 914(a), 916(b) and anengagement portion 914(b), 916(b). The arms 914, 916 are connected attheir terminal ends at the hinge 918 so that the arms 914, 916 are partof a scissor-like mechanism. In this example, one arm (e.g., arm 914)can be considered an engagement element while the other arm can beconsidered a stabilizing element (e.g., arm 916).

As shown in FIG. 10(b), the arms 914, 916 can open up to a lockedconfiguration. As shown in FIG. 10(c), the engagement portions 914(b),916(b) can engage the internal protrusions in the lock interface member610, so that the locking head 910 is secured to the lock interfacemember 610.

FIG. 11(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 920 includes a base 922with radially extending stabilizing elements 922(a) as well as first andsecond arms 924, 926 coupled to the base 922 via a hinge 928. Each arm924, 926 includes a linear portion 924(a), 926(b) and an engagementportion 924(b), 926(b). The first and second arms 924, 926 are connectedat their terminal ends at the hinge 928. Also, the first arm 924includes a trough 924(c) at its inner face, where the trough 924(c)receives the second arm 926 (see FIG. 11(b)). In this example, one arm(e.g., arm 924) can be considered an engagement element while the otherarm can be considered a stabilizing element (e.g., arm 926).

As shown in FIG. 11(c), the engagement portions 924(b), 926(b) canengage the internal protrusions in the lock interface member 610, sothat the locking head 920 is secured to the lock interface member 610.The engagement portions 924(b), 926(b) face away from each other in thisexample.

FIG. 12(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 930 includes a base 932with radially extending stabilizing elements 932(a) as well as first andsecond arms 934, 936 coupled to the base 932 via a pivot element 938.Each arm 934, 936 includes a linear portion 934(a), 936(a) and anengagement portion 934(b), 936(b). The first and second arms 934, 936are connected though the pivot element 938.

FIG. 12(b) shows an outward view of the top of the locking head 930 whenit is in a lock interface member 610 in a locked position. As shown bythe dotted lines in FIG. 12(b), the arms 934, 936 can be insertedbetween adjacent internal protrusions in the lock interface member 610.Once the engagement portions 934(b), 936(b) are inserted past theinternal protrusions, the engagement portions 934(a), 934(b) can rotateaway from each other as shown in FIGS. 12(b) and 12(c). Once this isdone, as shown in FIG. 12(b), the locking head 930 cannot be separatedfrom the lock interface member 610.

FIG. 13(a) shows another locking head embodiment. The locking head 940includes a base 942 with radially extending stabilizing elements 942(a)as well as first, second, and third engagement elements 944, 946, 948coupled to the base 932 via a pivot element (not shown). Each engagementelement 944, 946, 948 includes a main portion 944(a), 946(a), 948(a),and an engagement portion 944(b), 946(b), 948(b) integral with andextending from the main portion 944(a), 946(a), 948(a). As shown in FIG.13(a), the engagement elements 944, 946, 948 can rotate independently ofeach other so that the locking head 940 can be in a locked configurationas shown in FIGS. 13(a) and 13(b), or in an unlocked configuration asshown in FIG. 13(c). As shown in FIG. 13(c), the engagement portions944(b), 946(b), 948(b) are all aligned so that they can be inserted pastand between any adjacent internal protrusions in the lock interfacemember. Once the locking head 940 is in its proper position within thelock interface member, the engagement elements 944(b), 946(b), 948(b)can be rotated independently of each other, so that they can engagecorresponding internal protrusions in the lock interface member.

FIG. 14(a) shows another locking head embodiment. The locking head 950includes a base 952 with radially extending stabilizing elements 952(a)as well as first and second engagement elements 954, 956 coupled to thebase 952 via an attachment element 960 (see FIG. 14(c)). Each engagementelement 954, 956 includes a groove 954(a), 956(a), where the grooves954(a), 956(a) face away from each other. The first and secondengagement elements 954, 956 are also slidably coupled together viaslanted surfaces 954(b), 956(b).

FIGS. 14(b) and 14(e) show the locking head 950 in a lockedconfiguration while FIGS. 14(a) and 14(d) show the locking head 950 inan unlocked configuration. In the unlocked configuration, the first andsecond engagement elements 954, 956 can freely move into and out of alock interface member. However, in the locked configuration, the firstand second engagement elements 954, 956 are positioned slightly awayfrom each other so that the grooves 954(a), 956(a) can engage anyinternal protrusions in the lock interface member.

FIG. 15(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 960 comprise a base 962and first linear element 964 extending from the base 962. A movableengagement element 964(a) is coupled to the first linear element 964 viaa hinge 964(b). A second linear element 966 can be a stabilizing elementand can be connected to one end of the movable engagement element964(a).

As shown in FIG. 15(b), the second linear element 966 can actuate in anaxial direction out of the base 962 to cause the movable engagementelement 964(a) to be perpendicular to the orientation of the firstlinear element 964. Alternatively, the second linear element 966 canactuate in an axial direction into the base 962 to cause the movableengagement element 964(a) to be parallel to the orientation of the firstlinear element 964 as shown in FIG. 15(a).

As shown in FIG. 15(c), when the movable engagement element 964(a) isperpendicular to the first linear element 964(a), the movable engagementelement 964(a) is engaged with the lock interface member 610 and thelocking head 960 is secured to the lock interface member 610.

FIG. 16 shows another locking head embodiment according to an embodimentof the invention. The locking head 970 comprises a first part 970(a) anda second part 970(b) that is cooperatively configured to the first part970(a). The first part 970(a) includes a first base portion 970(a)-1 andthe second part includes a second base portion 970(b)-1. The firstand/or second base portions 970(a)-1, 970(b)-1 can form a base and canhave radially extending stabilizing elements. An engagement portion970(b)-2 is part of the second part 970(b) and extends axially from thesecond base portion 970(b)-1.

When it is used, the engagement portion 970(b)-2 can be inserted pastinternal protrusions in a lock interface member (not shown). After it isin a locked configuration, the first part 970(a) with the first baseportion 970(a)-1 can mate with the second part 970(b), and the firstbase portion 970(a)-1 can be inserted into the lock interface member.Then, as shown in FIG. 16, a cable 972 can thread through an aperture976 in the locking head 970.

FIG. 17(a) shows another locking head embodiment according to anotherembodiment of the invention. FIG. 17(a) shows a locking head 980comprising a base 982 including radially extending stabilizing elements982(a). A stabilizing element 984 including apertures 984(a) extendsfrom the base 982.

As shown in FIG. 17(b), engagement elements 986 can extend outward fromthe stabilizing element 984 at different points along the stabilizingelement 984. As shown in FIG. 17(c), when the locking head 980 is in alocked configuration, the engagement elements 986 engage the internalprotrusions in the lock interface member 610.

FIG. 18(a) shows another locking head embodiment according to anotherembodiment of the invention. FIG. 18(a) shows a locking head 990comprising a base 992 and an engagement element 994 extending from thebase 992. The engagement element 994 includes a linear portion 994(b)and an engagement portion 994(a).

As shown in FIG. 18(b), to engage the lock interface member 610, theengagement portion 994(a) contacts an inner wall of the lock interfacemember 610, and a stabilizing element 996 is inserted into the aperturein the lock interface member 610 to fill any remaining space. FIG. 18(c)shows that the stabilizing element 996 may have a groove which receivesthe linear portion 994(b) of the engagement element 994.

FIG. 19(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1000 includes a base 1002and an engagement element 1004 extending from the base 1002. Theengagement element 1002 includes first and second lateral wings 1004(a),1004(b) at a distal end of the engagement element 1002.

As shown in FIG. 19(b), a first stabilizing element 1006, and basestabilizing elements 1007 can stabilize the locking head within a lockinterface member 610 when the locking head 1000 is in a lockedconfiguration.

As shown in FIG. 19(c), after the engagement element 1004 is insertedinto the lock interface member 610 and after the wings 1004(a), 1004(b)are inserted past the protrusions in the lock interface member 610, itis rotated slightly so that wings 1004(a), 1004(b) overlap with theinternal protrusions of the lock interface member 610. Then, thestabilizing element 1006 is inserted into the aperture in the lockinterface member 610.

FIG. 20(a) shows another locking head embodiment according to anotherembodiment of the invention. FIG. 20(a) shows a locking head 1010including a base 1012 including radially extending stabilizing elements1012(a). An engagement element 1014 including a linear portion 1014(a)and an engagement portion 1014(b) extends from the base 1012. A movablestabilizing element 1016 also extends from the base 1012.

FIG. 20(b) shows the locking head 1010 in an unlocked configuration.FIG. 20(b) shows the locking head 1010 in a locked configuration. Asshown in FIG. 20(c), the engagement element 1014 engages the inner wallof the lock interface member 610, while the stabilizing element 1016fills the remaining space in the aperture in the lock interface member610.

FIG. 21(a) shows another locking head embodiment according to anotherembodiment of the invention. FIG. 20(a) shows a locking head 1020including a base 1022 including radially extending stabilizing elements1022(a). An engagement element 1024 including a linear portion 1024(a)and an engagement portion 1024(b) in the form of a “T” extends from thebase 1022. A movable stabilizing element 1026 also extends from the base1012.

FIG. 21(a) shows the locking head 1020 in an unlocked configuration.FIG. 21(b) shows the locking head 1020 in a locked configuration. Asshown, the stabilizing element 1026 can move in an axial directiontowards the engagement element 1024, and may include a groove 1026(a)which can receive the linear portion 1024(a) of the engagement element1024.

As shown in FIG. 21(c), the engagement portion 1024(b) of the engagementelement 1024 can be inserted into the lock interface member 610, pastprotrusions in the lock interface member 610. The engagement portion1024(b) can then be moved so that it overlaps with the protrusions inthe lock interface member 610. Then, as shown in FIG. 21(d), thestabilizing element 1026 fills space in the aperture in the lockinterface member 610 to secure the locking head 1020 to the lockinterface member 610.

FIG. 22(a) shows a locking head embodiment according to anotherembodiment of the invention. FIG. 22(a) shows a stationary engagementelement 1030 including a linear portion 1032(b) and an engagementportion 1032(a). As shown in both FIGS. 22(a) and 22(b), a linearstabilizing element 1034 with a trough can actuate in an axialdirection.

FIG. 22(c) shows the locking head embodiment when the locking head is ina locked configuration within a lock interface member 610. As shown, theengagement portion 1032(a) lies over a protrusion while the stabilizingelement 1034 stabilizes the locking head 1030 and secures it to the lockinterface member 610.

FIG. 23(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1040 includes threeengagement elements 1042(a), each including a groove 1042(a) at adifferent axial location. The grooves 1042(a) may be configured toreceive protrusions in a lock interface member, when the threeengagement elements 1042(a) extend in a radially outward direction asshown in FIG. 23(b). As shown in FIG. 23(c), a stabilizing element 1046may actuate in a forward axial direction to cause the engagementelements 1042 to move away from each other.

FIG. 24(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1050 comprises a base1058, and a plurality of engagement elements 1054 coupled to the base1058 via small hinges. As shown in FIG. 24(b), a stabilizing element1056 may move in a forward axial direction and may consequently push theengagement elements 1054 outward to engage protrusions in a lockinterface member. FIG. 24(c) shows a perspective view of the lockinghead 1050 when it is in a locked configuration.

FIG. 25(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1060 comprises a base 1062including radially extending stabilizing elements 1062(a), and aplurality of engagement elements 1064 coupled to the base 1062 via smallhinges 1066. As shown in FIGS. 25(b) and 25(c), a stabilizing element1066 may move in an axial direction upward and may consequently push theengagement elements 1064 outward to engage protrusions in a lockinterface member.

FIG. 26(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1070 comprises a base1076, and a compressible element 1072 comprising an elastomeric materialcoupled to the base 1076. The elastomeric material 1072 has a centralhole, and a movable stabilizing element 1074 can move in an axialdirection within the hole. As shown in FIG. 26(b), when the movingstabilizing element 1074 fills the hole in the compressible element1072, the compressible element 1072 is pushed radially outward so thatit engages the protrusions of the lock interface member 610. In thisexample, the compressible element 1072 may be an example of anengagement element. FIG. 26(c) shows a perspective view of the lockinghead 1070.

FIG. 27(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1080 includes a base 1082including stabilizing elements 1082(a) that extend radially outward. Thelocking head 1080 also includes a compressible element 1086 that isbetween a movable structure 1084(a) and an end structure 1084. In thisexample, the compressible element 1086 may be an example of anengagement element.

The locking head 1080 is in an unlocked configuration in FIG. 27(a) andthe compressible element 1086 is uncompressed. In FIGS. 27(b) and 27(c),the locking head 1080 is in a locked configuration. The compressibleelement 1086 compresses in response to the linear movement of themovable structure 1082. The end structure 1084 remains stationary. Asshown in FIG. 27(c), when the compressible element 1086 is compressed,it extends radially outward and engages the inner walls of the lockinterface member 610.

FIG. 28(a) shows another locking head embodiment according to anotherembodiment of the invention. FIG. 28(a) shows a hollow body 1092including a number of radially extending flanges 1092(a), and holes1092(b) at a distal end. Referring to FIGS. 28(a), 28(b), and 28(c), alinear movable structure 1094 moves within the hollow body 1092 and canpush balls 1096 or other structures radially outward to engageprotrusions in a lock interface member (not shown).

FIG. 29(a) shows another locking head embodiment according to anotherembodiment of the invention. FIG. 29(a) shows a locking head 1100including a base 1108 and three hollow, arc-shaped pillar structures1102 including holes on the sides thereof. As shown in FIGS. 29(a),29(b) and 29(c), balls 1104 may be present at lateral ends of thearc-shaped pillar structures 1102 and may extend outward from therespective pillar structures 1102 when a linear movable structure 1106within each pillar structure 1112 can moves toward the balls 1104. Theoutwardly extended balls 1104 can prevent the locking head 1110 frombeing withdrawn from a lock interface member. As in prior embodiments,the base 1108 may have radially extending stabilizing elements (notshown in FIG. 29(a)).

FIG. 30(a) shows another locking head embodiment according to anotherembodiment of the invention. FIG. 30(a) shows a locking head including abody 1111 with a first part 1110(a) and a second part 1110(b). Thesecond part 1110(b) has a larger diameter than the first part 1110(a).The first part has engagement elements 1110(a)-1 including differentaxial lengths. As shown in FIGS. 30(a) and 30(b), stabilizing elements1112 can be inserted into portions 1111 of an aperture in a lockinterface member 610 and alongside the second part 1110(b) to stabilizethe locking head 1110 with respect to the lock interface member 610.

FIG. 31(a) shows another locking head embodiment. FIG. 31(a) shows alocking head 1120 including a cylindrically-shaped base 1120(a)including axially extending stabilizing elements 1120(a)-1. Anengagement element 1120(b) with a linear portion 1120(b)-1 and axiallyextending engagement portions 1120(b)-1 of different lengths, can moveaxially within the cylindrically-shaped base 1120(b). The engagementportions 1120(b)-1 can engage the protrusions in the previouslydescribed lock interface members. After the engagement portions1120(b)-1 engage the protrusions in the lock interface member, thestabilizing elements 1120(a)-1 can be inserted into the lock interfacemember to secure the head 1120 to the lock interface member.

FIGS. 32(a)-32(c) show a locking head embodiment that is somewhatsimilar to the locking head embodiment shown in FIGS. 31(a)-31(c). Thelocking head in FIG. 32(a) additionally shows an actuating button 1121.In an embodiment of the invention, the actuating button 1121 can depresswhen a user pushes the locking head against a lock interface member.This, in turn, can cause the engagement element 1120(b) to move forwardas shown in FIG. 32(b) or cause the outer cylindrically-shaped base1120(b) to move forward as shown in FIG. 32(c). Thus, when the lockinghead is placed in the lock interface member at the correct depth, thesmall button 1121 (or plunger or the spindle itself) pushed in. Thisaction also comprises a spring, and the lock automatically moves intothe locked position. A turn of the key unlocks the device and resets thespring. In this embodiment, the actuation of the locking head elementscan be automatic.

FIG. 33(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1130 includes acylindrically-shaped base 1132 including axially extending stabilizingelements 1134. An engagement element 1136 with a linear portion 1136(a)and an engagement element 1136(b) can move axially within thecylindrically-shaped base 1132. An additional stabilizing element 1138can move within the cylindrically-shaped base 1132. As shown FIG. 33(c),the engagement portion 1136(b) can lie over a protrusion in the lockinterface member 610 when the lock interface member 610 is engaged tothe locking head 1130. The stabilizing element 1138 can additionallyreside between two adjacent internal protrusions in the lock interfacemember 610.

FIG. 34(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1140 includes acylindrically-shaped base 1142 including axially extending stabilizingelements 1144. An engagement element 1144 with a linear portion 1145 andmovable engagement portions 1146 can extend from the base 1142. As shownin FIGS. 34(b)-34(c), the movable engagement portions 1146 can be biasedradially outward using springs 1149. Moveable linear structures 1148 canbe in the linear portion 1145 and can prevent the movable engagementportions 1146 from being pushed radially inward when the locking head1130 is in a locked configuration.

FIG. 35(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1150 includes acylindrically-shaped base 1151 including axially extending stabilizingelements 1151(a). An engagement element 1152 with a linear portion1152(a) and movable engagement portions 1152(b) can extend from the base1151. As shown in FIG. 35(b), the movable engagement portions 1152(b)can extend radially outward when the locking head 1150 is in a lockedconfiguration.

As shown in FIG. 35(a), when it is in an unlocked configuration, theengagement elements 1152(b) are flush with the linear portion 1152(a).Once placed into the lock interface member, the user pushes a button (asshown in FIG. 35(c)) or turns a knob (as shown in FIG. 36(d)) to changethe locking head 1150 from a locked configuration to an unlockedconfiguration. The engagement elements 1152(b) then rotate into place,and are secured to the lock interface member.

FIG. 36(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1160 includes acylindrically-shaped base 1162 including axially extending stabilizingelements 1162(a). An engagement element 1164 with a linear portion1164(c) and movable engagement portions 1164(b) can extend from the base1162. The linear portion 1164(c) has a triangular radial cross-section.As shown in FIGS. 36(b), the movable engagement portions 1164(b) canextend radially outward when the locking head 1160 is in a lockedconfiguration. More specifically, as shown in FIG. 36(c), when thelinear portion 1164(c) rotates, it pushes the movable engagementportions 1164(b) outward so that they lie over protrusions in the lockinterface member 610. The linear portion 1164(c) may be in the form of atriangular bar that is turned by a locking mechanism. This causes thelocking “jaws” to rotate into place, preventing its removal from a lockinterface member.

FIG. 37(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1170 includes acylindrically-shaped base 1172 including axially extending stabilizingelements 1172(a). An engagement element 1174 with a linear portion1174(b) and movable, curved, engagement portions 1164(a) can extend fromthe base 1172. The movable engagement portions 1174(a) are curved. Thelinear portion 1174(b) has curved sides and has a cylindrical shape. Asshown in FIG. 37(b), the movable engagement portions 1174(a) can extendin a generally axial direction when the locking head 1170 is in a lockedconfiguration. As shown in FIG. 37(a), when unlocked, the engagementportions 1174(a) are flush with the end of the linear portion 1174(b).Once placed into the lock interface member, the lock mechanism couldpush the engagement portions 1174(a) out via rods or using a high-anglehelix to twist them out (see FIGS. 37(c) and 37(d)).

FIG. 38(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1180 includes acylindrically-shaped base 1182 including axially extending stabilizingelements 1182(a). An engagement element 1184 with a linear portion1184(b) and movable engagement portions 1184(a) can extend from the base1182. The movable engagement portions 1184(a) have inner grooves thatcan receive the linear portion 1184(b). The linear portion 1184(b) hasan elongated radial cross-section. As shown in FIG. 38(b), the movableengagement portions 1184(a) can move radially outward when the lockinghead 1180 is in a locked configuration. The linear portion 1184(b) canbe twisted by a lock mechanism, causing the two locking “jaws” of themovable engagement portions 1184(a) to flex or hinge into place as shownin FIGS. 38(c) and 38(d).

FIG. 39(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1190 includes acylindrically-shaped base 1192 including axially extending stabilizingelements 1192(a). An engagement element 1194 with a linear portion1194(b) and movable engagement portions 1194(a) can extend from the base1194(b). As shown in FIG. 39(b), the movable engagement portions 1194(a)can be move radially outward. As shown in FIGS. 39(c) and 39(d), amoveable linear structure 1198 can be in the linear portion 1194(b) andcan push the movable engagement portions 1194(a) outward so that theyengage the protrusions of the lock interface member 610.

FIG. 40(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1200 includes acylindrically-shaped base 1202 including axially extending stabilizingelements 1204. An engagement element 1208 in the form of plate isattached to a linear portion 1206 via a smaller linear portion 1206(a)and a hinge 1206(b). A second movable linear portion 1209 is attached tothe engagement element 1208 and can move axially within the linearportion 1206 to cause the engagement element 1208 to be positionedperpendicular to (in a locked configuration) or parallel to (in anunlocked configuration) the linear portion 1209. Thus, in thisembodiment, an engagement element 1208 in the form of a hinged plate ordisc slides into the lock interface member. When the locking mechanismis actuated, the engagement element 1208 flips from horizontal tovertical, locking it into position. This is shown in FIGS. 40(c)-40(e).

FIGS. 41(a) and 41(b) show another locking head embodiment according toanother embodiment of the invention. The locking head 1210 includes acylindrically-shaped base 1212 including axially extending stabilizingelements 1214. An engagement element 1214 with an engagement portion1214(a), in the form of tiltable structure, is attached to linearportions 1214(b) via a hinge 1206(b). As shown in FIGS. 41(c) and 41(d),the engagement portion 1214(a) of the engagement element 1214 is flushwith the linear portions 1214(b) when it is in an unlockedconfiguration. After the structure is placed inside the lock interfacemember, as shown in FIGS. 41(c) and 41(d), the lock mechanism drives arod 1219 forward, locking the engagement element 1214 in place.

FIG. 42(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1220 includes acylindrically-shaped base 1222 including axially extending stabilizingelements 1222(a). An engagement element 1224 with a linear portion1224(b) and movable engagement portions 1224(a) can extend from the base1222. As shown in FIG. 42(b), the movable engagement portions 1224(a)can move radially outward. As shown in FIG. 42(b), a linear portion1224(b) can push the movable engagement portions 1224(a) outward so thatthey engage the protrusions of a lock interface member. The linearportion 1224(b) can have a flared end that is pulled back by a lockmechanism (e.g., as shown in FIG. 42(c). The flared end forces the threeengagement portions 1224(b) apart preventing removal of the locking head1220 from a lock interface member.

FIG. 43(a) shows another locking head embodiment according to anotherembodiment of the invention. The locking head 1230 includes acylindrically-shaped base 1232 including axially extending stabilizingelements 1232(a). An engagement element 1234 with a movable engagementportion 1234(a), and linear portions 1234(b), can extend from the base1232. As shown in FIG. 43(b), the movable engagement portions 1234(a)can move radially outward. As shown in FIG. 43(b), linear portions1234(b) and can push the movable engagement portion 1234(a) outward sothat it engages the protrusions of a lock interface member. When placedinside of a lock interface member, the linear portions 1234(b) areactuated. This distorts the engagement portion 1234(b) which may be inthe form of a cylindrical leaf spring and prevents the locking head 1230from being removed from a lock interface member.

FIGS. 44(a)-44(b) show another locking head embodiment according toanother embodiment of the invention. The locking head 1240 includes acylindrically-shaped base 1242 including axially extending stabilizingelements 1242(a). An engagement element 1244 with a linear portion1244(b) and movable engagement portions 1244(a) can extend from the base1242. As shown in FIG. 44(b), the movable engagement portions 1244(a)can move radially outward. Pins 1245 may couple the linear portion1244(b) to the engagement portions 1244(a) and may move linearly withintracks 1247 in the linear portion 1244(b). This embodiment is avariation on the embodiment in FIGS. 44(a) and 44(b). In thisembodiment, once the locking head portions are placed inside the lockinterface member, the locking mechanism drives two pins 1245 forward,causing the movable engagement portions 1244(a), which may be a leafspring, to distort and locking it in place. FIGS. 44(c)-44(d) show themovement of the leaf spring between locked and unlocked configurations.

FIGS. 45(a)-45(b) show another locking head embodiment according toanother embodiment of the invention. The locking head 1250 includes acylindrically-shaped base 1252 including axially extending stabilizingelements 1252(a). An engagement element 1254 with a cylindrically shapedlinear portion 1254(b) and movable engagement portions 1254(a) canextend from the base 1252. As shown in FIG. 45(b), the movableengagement portions 1254(a) can move radially outward to engageprotrusions in a lock interface member 610 as shown in FIGS. 45(c) and45(d). This embodiment can be considered a “triple leaf springembodiment. When the locking head 1250 is in an unlocked configuration,three engagement portions 1254(b) in the form of three leaf springs witha “memorized” shape are inside the linear portion 1254(b). Once in placein the linear portion 1254(b), a lock mechanism pushes the engagementportions 1254(b) out, they return to their original shape, and thelocking head 1250 cannot be separated from the lock interface member610.

I. EXAMPLES

Three different types of locking systems were produced for testing. Theengagement elements include a Type A system which resembled T-bars likethose described in U.S. Pat. No. 5,502,989, a Type B system whichresembled the mechanism shown in FIGS. 2(b) and 2(d) in the presentapplication, and a Type C system which resembled the mechanism shown inFIGS. 4(a)-4(c) in the present application.

A. Test Description

A test rig was used to apply the pull force to the systems. Amulti-meter was used to measure the force a load sensor from 0-3000 lbs.The basic rig was used to pull on all three locking mechanisms. As eachmechanism was a different shape, each locking mechanism required aslightly different fixture to hold the unit in place for the pull test.

The objective of each test fixture was to lock the mechanism into placeand pull axially along the shaft of the T-bar or other type ofengagement element, and 90 degrees to the engagement surface.

Type A system including a T-bar: An engagement plate with a conventional3.times.7 mm.sup.2 slot was affixed to a test rig with C clamps. TheType A T-bar test fixture was locked into place and pulled using a flatclamp to hold the top of the locking mechanism. The T-bar and engagementplate were made of stainless steel.

Type B system: An engagement plate with a configuration like the lockinterface member in FIG. 2(b) was affixed to the test rig with C clamps.The Type B system was locked into place and pulled using a radial clampto hold the top of the locking mechanism. All parts were made ofstainless steel.

Type C system: An engagement plate with a configuration like the lockinterface member shown in FIGS. 4(a)-4(c) included two parts includingthe actual engagement surface and a plate with C clamps, which held theengagement surface to the rig. As the Type C system did not have enoughsurface area to grip with a clamp, the Type C system was locked intoplace and was pulled using a flat steel metal piece with a hole in itfor the shaft. All parts were made of stainless steel.

Six Type A T-bar samples, and five Type B and five Type C samples weretested. Each locking mechanism was attached to its corresponding fixtureand pulled until a failure was noticed. The force of the pull wasrecorded by the multi-meter as a voltage. Then after the recording, thepound force required to cause the failure was calculated.

B. Test Results

Test results for the Type A system are provided below.

Type A T-bar Sample No. Pull force to Failure Type of failure 1 1273.5lbs Unit bent 2 1219.7 lbs Unit broke 3  699.5 lbs Unit broke 4 1215.2lbs Unit broke 5 1210.7 lbs Unit broke 6 1174.8 lbs Unit broke

Test results for the Type B system are provided below.

Type B Sample No. Pull force to failure Type of failure 1 1520.1 lbsDeformed 2 1937.2 lbs Deformed and broke (It was not clear whether theother units broke or only deformed as broken pieces may have been missedas they were so small) 3 1488.7 Deformed 4 1668.1 Deformed 5 1937.2Deformed

Test results for the Type C system are provided below.

Type C Sample No. Pull force to failure (lbs) Type of failure 1 1757.8Unit broke 2 1753.3 Unit broke 3 1793.7 Unit broke 4 1623.3 Unit broke 51668.1 Unit broke

The Type A T-Bar failure range was from 699.5 to 1273.5 with an averageof 1132.2. The Type B failure range was from 1448.7 to 1937.2 with anaverage of 1710.3. The Type C failure range was from 1623.3 to 1793.7with an average of 1719.2. Based on the averages as well as the 5 datapoints, the Type B and Type C embodiments required greater pound forceto failure than the Type A T-bar embodiment. On average, the Type Cembodiment and the Type B embodiment experienced approximately 50% morepound force to failure than the Type A T-bar embodiment.

The above description is illustrative and is not restrictive. Manyvariations of the invention will become apparent to those skilled in theart upon review of the disclosure. The scope of the invention should,therefore, be determined not with reference to the above description,but instead should be determined with reference to the pending claimsalong with their full scope or equivalents.

One or more features from any embodiment may be combined with one ormore features of any other embodiment without departing from the scopeof the invention.

A recitation of “a”, “an” or “the” is intended to mean “one or more”unless specifically indicated to the contrary.

1. (canceled)
 2. A security apparatus for securing a portable electronicdevice to an immovable object, the portable electronic device having anaperture, the security apparatus comprising: a locking head including abase, a first engagement element rotatably coupled to the base, thefirst engagement element configured to be inserted into the aperture ofthe portable electronic device, and a second engagement elementrotatably coupled to the base, the second engagement element configuredto be inserted into the aperture of the portable electronic device withthe first engagement element, wherein the first engagement element andthe second engagement element are rotatable relative to each other abouta common axis; and a security device attached to the locking head andconfigured to engage the immovable object.
 3. The security apparatus ofclaim 2, wherein each of the first engagement element and the secondengagement element includes a linear portion extending from the base andan engagement portion formed at an end of the linear portion.
 4. Thesecurity apparatus of claim 3, wherein the engagement portions of thefirst and second engagement elements are rotatable away from each otherto engage the portable electronic device.
 5. The security apparatus ofclaim 2, wherein the locking head further includes a pivot element, andwherein the first and second engagement elements are coupled to the basevia the pivot element.
 6. The security apparatus of claim 2, whereineach of the first engagement element and the second engagement elementincludes a main portion and an engagement portion extending from themain portion.
 7. The security apparatus of claim 6, wherein the mainportions of the first and second engagement elements are axiallystacked.
 8. The security apparatus of claim 7, wherein the locking headfurther includes a third engagement element having a main portion and anengagement portion extending from the main portion, and wherein the mainportion of the third engagement element is axially stacked with the mainportions of the first and second engagement elements.
 9. The securityapparatus of claim 7, wherein the first and second engagement elementsare rotatable independently of each other.
 10. The security apparatus ofclaim 7, wherein the locking head is movable between an unlockedconfiguration, in which the engagement portions of the first and secondengagement elements are aligned, and a locked configuration, in whichthe engagement portions of the first and second engagement elements arenot aligned.
 11. The security apparatus of claim 2, further comprising alock mechanism coupled to the locking head, wherein the lock mechanismis operable to rotate the first and second engagement elements.
 12. Thesecurity apparatus of claim 2, wherein the base includes axiallyextending stabilizing elements.
 13. The security apparatus of claim 2,wherein the security device includes a cable.
 14. A system comprising: aportable electronic device having an aperture; and a security apparatusincluding a locking head having a base, a first engagement elementrotatably coupled to the base, the first engagement element beinginsertable into the aperture of the portable electronic device, and asecond engagement element rotatably coupled to the base, the secondengagement element being insertable into the aperture of the portableelectronic device with the first engagement element, wherein the firstengagement element and the second engagement element are rotatablerelative to each other about a common axis, and a security deviceattached to the locking head and configured to engage an immovableobject to secure the portable electronic device to the immovable object.15. The security apparatus of claim 14, wherein each of the firstengagement element and the second engagement element includes a linearportion extending from the base and an engagement portion formed at anend of the linear portion, and wherein the engagement portions of thefirst and second engagement elements are rotatable away from each otherto engage the portable electronic device.
 16. The security apparatus ofclaim 14, wherein the locking head further includes a pivot element, andwherein the first and second engagement elements are coupled to the basevia the pivot element.
 17. The security apparatus of claim 14, whereineach of the first engagement element and the second engagement elementincludes a main portion and an engagement portion extending from themain portion, and wherein the main portions of the first and secondengagement elements are axially stacked.
 18. The security apparatus ofclaim 17, wherein the first and second engagement elements are rotatableindependently of each other.
 19. The security apparatus of claim 17,wherein the locking head is movable between an unlocked configuration,in which the engagement portions of the first and second engagementelements are aligned, and a locked configuration, in which theengagement portions of the first and second engagement elements are notaligned.
 20. The security apparatus of claim 14, further comprising alock mechanism coupled to the locking head, wherein the lock mechanismis operable to rotate the first and second engagement elements.
 21. Thesecurity apparatus of claim 14, wherein the security device includes acable.